Shulchan Aruch – Chapter 25

Making or removing a partition a handsbreadth wide, even if it is temporary, is forbidden if it is a roof or is a wall that serves a religious purpose, but if a handsbreadth of such a wall or roof already existed before the Sabbath, temporary addition to it is permitted; see 315:1-2,4,9-10. Temporary partitions are permitted if the surrounded space is less than a handsbreadth (see 315:11-13) or if there is no need for that space, but the walls should not be put up before the roof (see 315:3,5-7). On oblique partitions see 315:8,11.

Breaking or opening an unbroken utensil, or deliberately widening an opening, is forbidden, but removing or opening attached pieces is permitted provided they are not permanently attached (see 314:7-10) and the intent is only to get access to the contents, not to create an opening (see 314:1-4,6) or to use the pieces (see 308:44;340:13). On stopping up an opening see 314:11. Temporarily opening or closing even a permanent structure is permitted when it is done with objects that are used for that purpose, such as doors, shutters, and locks; see 308:9-10 and 313:1,3-4. Making holes in the ground (or in an object attached to the ground), or smoothing them out, is forbidden (see 313:2;314:12;316:11;324:15;333:1;336:13;337:1-4;338:5).

Making, assembling, or fixing a utensil is forbidden (see 279:7;308:16; 313:5,8;314:5;317:3;322:4;340:8) unless the parts are loose (see 313:6-7,9), or the utensil is made from edible material (see 322:4), or the repair is done in a nonstandard way (see 313:10;336:9).

It is forbidden to tie or untie a permanent knot (see 314:7-10;317:1-7; 324:4). It is permitted to tighten or loosen a drawstring (340:7), but it is forbidden to tighten or loosen even temporary stitching (see 317:3; 340:6), to paste objects together or to separate pasted objects (340:14).

It is forbidden to gather plants or natural objects from the place where they originated (see 340:9) or to assemble them into a single object (see 340:10). It is forbidden to reshape a deformable substance [other than food] (see 314:11;316:11) or to soften a hard substance (see 327:4). It is forbidden to make or destroy even temporary markings, or to make a surface suitable for marking; see 340:3-5.

It is forbidden to drop seeds in a place where they may grow, or to spill water in a place where plants may benefit from it (336:3-4), or to soak seeds in water (336:11). Cut plants may be put in water so they will not wilt (321:11), but not if they may open (see 336:11). It is forbidden to detach parts from a plant that has taken root, even in an object that is not attached to the ground (336:5-7), and even if the parts are no longer alive (336:12); and it is forbidden to take such an object off the ground or put it on the ground (336:8).

It is forbidden to make any direct use (see 336:13) of any part of a tree that is more than three handsbreadths above the ground (see 336:2) — for example, to climb it (see 336:1), move it (see 336:13), put something on it or lean something against it (see 277:4). It is permitted to make use of other types of plants, provided this does not detach them from the ground (see 312:6;336:1,3), but edible parts of such plants should not be handled (336:10).

Devarim Rabbah – Sefaria

When a fool comes into the study hall and sees everyone busy learning, he asks, “How does a person start learning Torah?” They tell him: “First he learns to read. Then he studies the Five Books of Moses, then the Prophets, then the rest of the written Torah, then he goes on to the Oral Torah, the Talmud, the laws and the aggada.” The fool says, “When will I ever learn all this?” and he runs away. But the wise man studies a chapter a day until he completes the entire Torah. (Midrash Rabba Devarim 8:3)